Worst
Ksenia's FS dress — pepto bismol pink ICK! The white dress she wore at Worlds was a great improvement!
Mirai's FS dress — Probably influenced by my dislike of the program, but I believe the dress was not that flattering on her, all the extra layers made her look bigger than she actually is.
Maia Shibutani's purple SD dresses both the one she wore at Finlandia and and the one she world at Worlds. Made her look took much like a junior drum majorette (which is terrible if you're trying to do Latin). She is SOOOO pretty and mature for her age, that it's frustrating the dresses did not do her any favors. Though the Finlandia dress at nationals (with the alterations) was OK.
Ekateria Bobrova's witchy dresses, particularly the Halloween colored one.
Adelina's red thing in the SP.
Elizaveta's green number in the SP. Her original red dress was better